Spring bed bottom



Feb. 28, 1933. M, THUM SPRING BED BOTTOM Filed Feb. 28, 1950 INVENTORa1; ATTORNEY Patented Feb. 28, 1933 UNITED STATES MARTIN THUMI, OFROCHESTER, NEW YORK srame BED BOTTOM Application filed February 28 1930.Serial ITO-432,191.

'- The present invention relates to spring bed bottoms and moreparticularly to the type in which a webbing is supported resiliently bya frame. An object of this invention is to 5 provide a novel means forpreventing the sagging of the webbing through use. Another object of theinvention is to providea trussed means for the webbing situated at sucha point or points thereon that sagging is prevented.

To these and other ends, the invention consists of certain parts andcombinations of parts all of which will be hereinafter described: thenovel features being pointed out 15 inthe appended claims. I

In the drawing: a r Fig. 1 is a plan view of a bed bottom constructed inaccordance with this invention; Fig. 2 is a side view of the bed bottom;L Fig. 3 is an enlarged fragmentary transverse vertical section on theline 33, Fig. 1; and

Fig. 4 is an" enlarged fragmentary plan view. Q a

In the illustrated embodiment theframe embodies two side rails 1 havingcastings 2 projected upwardly from the ends thereof.

and connected by cross heads 3 to which-the 0 webbing is connected atopposite ends. Each of the cross heads 3 consists of two angle membersreversely arranged, with two flanges overlapping and the other twoflanges proj ecting in the same direction, and forming in effect a crosshead of channel formation. a

The webbing, in this instance, embodies a plurality of ribbons or straps4 extending longitudinally of the frame and connected by coil springs 5to the upper flanges of the cross heads 3., These straps or ribbons 4are inturn connected by springs 6. with proximate straps 4. At each sideof the webbing is arranged a sag preventing device which in thisinstance comprises an upper s1de strap or r1bbon7 0 relativelongitudinal movement by truss devices in the form of uprightorvertically extending spacing tubes 9 through which bolts or rivets 10pass afterward being upset on the outer faces of the two straps; Theends of both'strap's 7 and Sam connected by- 0011 springs 11 withrespectively the upper and lower flanges of the cross heads 3 while thesides of; the upper straps 7 are connected by coil springs 12 with thesides of the adacentstraps 4 of the Webbing. I The two sag preventingdevices are also connected together by transversely ex tending straps 13interwoven between the straps 4 and having coil springs 14'at their endsconnected to the straps 7 of the side sag preventing devices.

These transversely extending straps 13 may also be rigidly secured tosome of the straps 4 which are also trussed to prevent sagging of thewebbing away from the sides.

To this end rivets or bolts 15 secureth'e straps 13 to two of the'straps4, and'b'eneath these straps 4 are arranged wider straps 16 which areheld by the rivets or bolts 15 after the latter pass through the trusstubes '17 arranged between the saidstraps 4 and 16-. T hestraps 16 areconnected at their'ends to the cross heads 3 by springs 17a'a'nd servewith the straps4 directly above them to provide sag preventing devicesaway fromthe sides. These sag preventing devices are in turn through thetransversely extending straps 13 connected with the side sag preventingdevices. a w This invention provides a novel sag preventing means forsoring bed bottoms. The sag preventing devices are flexible in a vertiacal direction but are not flexible in ahorizontaldirection. They quicklyreturn the bedbottom to its normal condition as soon as relieved ofweight and. do not become sagged afteruse. Each sag preventing devicehas two ribbons arranged in'spaced relation, and held in such relationby truss devices arranged in spaced relation along the length of theribbons or. straps; The two straps are each connected yatreach endtolone of the cross heads. Sag preventing devices may not only bearranged ohopposite sides 1 son on the bed bottomis such that the webwebmembers.

of the straps of the webbing,

bing members 4 extend horizontally as well as longitudinally: that thestraps 7 and 8 are vertically spaced and extend horizontally as well aslongitudinally. to-wit, the upper side strap 7 and the lower side strap8 of the sag preventing devices that are located at opposite sides ofthe bed bottom; that the webbing members 4: are at the level of theupper side straps 7 of the sag preventing devices and thatthe webbingmembers 4 are in effect locally supported at several places throughout;their length by longitudinally spaced transversely extending, membersthat are connected to, which extend between and which are supported bythe sag, preventing devices and more particularly to, between and by theupper straps of said sag prevent- 7 ing devices. As shown in the drawingthe sag preventing means or devices are transversely arranged atopposite sides of the longitudinally extending webbing members 4 or asotherwise expressed atv opposite sides of a, or at opposite sides ofgroups or sets of the longitudinally extending Webbing. member ormembers 4' whereby said webbing membeps' 4 are in fact locatedintermediate or between sag preventing devices' It is therefore properin respect to the horizontally and longitudinally extending webbingmembers 4 to refer to the, same as intermediate webbing members.Therefore herein the longitudinally extending web members 4 which arebetween the sag preventing means are some times referred to asintermediate webbing members and sometimes as the longitudinally andhorizontally extending intermediate 1 What I claim as my invention anddesire to secure by Letters Patent is '1. In a spring bed bottom, thecombination with a frame and a webbing resiliently connected to theframe and embodying .a plurality of longitudinally extending straps, avertically fiexibleqstrap arranged under one and having a trussedconnection with the under side of said webbing strap, a springconnecting said under strap at its endsto the frame, a transversestrapsecuredto the strap to which the under strap is secured, extendingin opposite directions therefrom and interwoven with the otherlongitudinally extending straps of the webbing, two sag preventingdevicesarranged alongopposite free sides of the web- 7 hing, springsconnecting the ends of the transverse strap to the two side sagpreventingdevicemand springs connecting the side sag preventing deviceswith the adjacent longitudinal straps of the webbing.

- 2. In a spring bed bottom the combination with a frame oflongitudinally andhorizontally extending intermediate webb-ings eachresiliently'connected at opposite ends to the frame, sag preventingdevices between which said intermediate webb-ings are located, each ofsaid sagpreventing devices comprisingtwo longitudinally and horizontallyextending flexible straps located one above the other and rigidlysecured togetherthrougl1 the medium of longitudinal- 3. In a spring bedbottom, the combination with a frame,'a sag preventing device at eachside of the bed bottom, longitudinallyw and horizontally extendingwebbings having the ends thereof connected to the frame and whichwebbings are located between said sag preventing devices, each sagpreventing device comprising upper and lower longitudi nally extendingstraps, longitudinally spaced truss devices between the respectivestraps for rigidly securing the straps to each other in verticalspacedrelationship one over the other, the webbings at their side edgesbeing connected by transversely extending members to the upper straps soas to'receive support therefrom and being depressible adj a-cent-theinner sides of the straps underthe weight of a person sitting on theedge of a bed, and a resilient connection whereby each end of eachlongitudinally extending strap of the sag preventing device is securedto therespective ends of the frame. N

a. A springbed bottom comprising a frame, a longitudinally extendingwebbing connected to opposite ends of the frame, pairs of longitudlnallyextending metal straps,

there being a pair for each side of the web tudinally spaced verticallyextending spacing tubes and-bolts or rivets that pass through thespacing tubes and which bolts or rivets in conjunction-{with theirassociated spacing tubes rigidly connect the straps of each pair I atlongitudinally spaced intervals, the webb ing being connected atlongitudinally iso ' straps which are vertically spaced from each spacedintervals to the upper straps of the respective pairs, and transversestraps yield 5. A spring bed bottom comprising a frame, longitudinallyextending webbing connected to opposite ends of the frame, a pair ofmetal side straps for each of the opposite sides of the bed bottom, thestraps of each pair being provided by upper and lower other throughouttheir length and yieldably connected to opposite ends of the frame,vertical spacing and connecting means bracingly connecting straps ofeach pair at longitudinally spaced intervals, the webbing being con- 7nected at longitudinally spaced intervals to the upper straps oftherespective pairs, lower longitudinal intermediate straps eachvertically spaced from a longitudinal webbing member above it andyieldably connected at their ends to the frame, transverse strapsyieldably connected at their ends to the upper side straps andinterwoven with the longitudinally extending webbing, and verticalspacing and connecting means bracingly connecting the intermediatelongitudinal straps with the longitudinally extending webbing above themand with the transverse straps at the points where the transverse strapscross said longitudinally extending webbing that are above the lowerlongitudinally extending intermediate straps.

6. A spring bed bottom comprising a frame having channel cross headsformed of reversely disposed angle members, horizontally andlongitudinally extending webbings connected to the upper flanges of thecross heads, a pair of upper and lower vertically spaced side straps ateach side of the spring bed bottom which upper and lower side straps arebracingly connected at longitudinally spaced intervals, springsconnectln the respective upper and lower straps to t e upper and lowerflanges of the cross heads, the webbings being connected atlongitudinally spaced intervals to the upper side straps,

longitudinal intermediate lower straps vertically spaced from and belowwebbings corresponding thereto and yieldably connected to the lowerflanges of the cross heads, transverse straps yieldably connected to theupper side straps and interwoven with the webbings and means bracinglyconnecting therlongitudinal intermediate lower straps with the webbingsand transverse straps at points where the Webbing and transverse strapscross.

MARTIN THUM.

